Notes: Food Chains and Food Webs

Slides:



Advertisements
Similar presentations
Energy in Ecosystems MRS. PITTALUGA 8 TH GRADE SCIENCE.
Advertisements

Consumers are not all alike. Herbivores eat only plants.
Food Webs & Energy Pyramids
Ecosystem Structure.
Food Chain – a model of how energy is passed from organism to organism in a community Energy moves from one organism to the next in a one-way direction.
Ecology Standards 6a. Know biodiversity is the sum total of different kinds of organisms & is affected by alterations of habitats 6b. Know how to analyze.
Trophic Levels & Energy in Ecosystems. Energy Movement through Ecosystems Energy flows through ecosystems Trophic levels: feeding relationships.
Energy Flow Through an Ecosystem Food Chains, Food Webs, Energy Pyramids.
Remember Ecosystem, Habitat and Niche?
Energy Flow in the Biosphere,
13.4-Food Chains and Food Webs
Feeding Relationships Food Chains And Webs.. FOOD CHAINS You need to be familiar with the idea of food chains. In its simplest sense, a food chain shows.
MRS. SANDY GÓMEZ Energy Flow in Ecosystems. Are the feeding relationships between organisms. A Food Chain is:  transfer of food energy from its source.
Energy Flow In An Ecosystem Unit 11 - Ecology. Producers  The most important part of an ecosystem  Without a constant energy source, living things cannot.
Chapter 3: How Ecosystems Work Section 3.1: Energy Flow in Ecosystems.
Energy Flow Page 65 of INB. Essential Question: How does energy flow in an ecosystem?
 the transfer of energy and matter in the form of food when one organism eats another organism.
Energy Flow Through an Ecosystem Food Chains, Food Webs, Energy Pyramids.
Food Chains, Webs & Pyramids! 1) The Passage of Energy The Sun The source of energy for all life on the planet Producers (Autotroph) Use the sun’s energy.
Ecosystem Components Producers – Basis of an ecosystem’s energy – Autotrophs: perform photosynthesis to make sugars – Chemotrophs: Bacteria which use.
Ecosystem Components Producers – Basis of an ecosystem’s energy – Autotrophs: perform photosynthesis to make sugars – Chemotrophs: Bacteria which use.
Food chain- simple model that shows how matter and energy move through an ecosystem
AIM: How does energy flow through an ecosystem? DN: What is a niche? Can two organisms occupy the same exact niche? Explain.
1 Energy Flow Through an Ecosystem Food Chains, Food Webs, Energy Pyramids.
Food Chains, Webs, and Pyramids. Ecosystems are divided into different sections called trophic levels Each trophic level represents a transfer of energy.
Energy Flow through an Ecosystem
ENERGY TRANSFER pp
A food chain links species by their feeding relationships.
Trophic Levels and 10% Rule
Energy Flow Through an Ecosystem
Ecosystem Structure.
A food chain links species by their feeding relationships.
A food chain links species by their feeding relationships.
Energy Flow Through an Ecosystem
April 26, 2017 Journal: How are photosynthesis and cellular respiration related to each other?
Ecosystem inputs nutrients cycle inputs energy nutrients
Warm-up 3/5: • Place Community, Biosphere, Population, Organism and Ecosystem in order from Most Inclusive to Least Inclusive. • Name 2 herbivores and.
Energy Flow in Ecosystems
Energy Flow Within an Ecosystem
Ecology SB4.
Energy Flow in Ecosystems
What do the solid arrows represent?
A food chain links species by their feeding relationships.
FOOD CHAIN & FOOD WEB NOTES
Interactions of Ecosystems
The Niche a way of life or a role in an ecosystem.
Consumers Acquire energy from others by eating AKA:Heterotrophs.
A food chain links species by their feeding relationships.
A food chain links species by their feeding relationships.
A food chain links species by their feeding relationships.
Ecology SB4.
Energy Flow in Ecosystems
Energy Flow Through Ecosystems Chapter 5 section 1
A food chain links species by their feeding relationships.
A food chain links species by their feeding relationships.
Energy Paths.
Feeding Relationships
Energy and Ecology.
Page 5 In Your Unit 7 Notebook
Trophic Levels:.
Ecology Relationships Among Organisms
A food chain links species by their feeding relationships.
ENERGY FLOW SB4b.
FOOD CHAINS & FOOD WEBS.
Energy Flows – Food Chains and Food Webs
What do the arrows indicate?
A food chain links species by their feeding relationships.
A food chain links species by their feeding relationships.
Ecological Pyramids Diagrams that show relationships between organisms in an ecosystem Three types of ecological pyramids: Numbers Biomass Energy Show.
Presentation transcript:

Notes: Food Chains and Food Webs

FOOD CHAIN Single sequence that links species by their feeding relationships. Traces the transfer of energy Simplest way to look at energy flow in an ecosystem

Trophic Levels level in a food chain 1. Producers always first level 2. Primary consumers next level (herbivore) 3. Secondary consumer- eat herbivores (small carnivore or omnivore) 4. Tertiary consumer-carnivores that eat secondary consumers.

Large Carnivore Small Carnivore Herbivore Producer 3˚ Consumer (tertiary) Killer Whale Small Carnivore 2˚Consumer (secondary) Ex: Sea Otter Herbivore 1˚ Consumer (primary) Ex: Sea Urchin Producer Ex: Kelp

FOOD WEB Interconnected food chains Organisms usually have multiple feeding relationships

FOOD WEB More realistic display of feeding relationships Arrows show transfer of ENERGY

ENERGY TRANSFER trophic level: position in a series of energy transfers

Only 10% of the total energy is passed onto the next trophic level

Only 10% of the total energy is passed onto the next trophic level 1. lost to biological processes (digestion, growth and repair, running, walking etc.) 2. lost as heat

3˚ Consumer Ex: killer whale Small Carnivore 2˚Consumer Ex: sea otter Large Carnivore 3˚ Consumer Ex: killer whale Small Carnivore 2˚Consumer Ex: sea otter Herbivore 1˚ Consumer Ex: sea urchin Producer Ex: Kelp 90 % Energy Lost 90 % Energy Lost 90 % Energy Lost

Why is a Pyramid used to display Energy transfer between trophic levels? Hint: Why not a square?

Video

KEYSTONE SPECIES Has a disproportionately large effect on the ecosystem

KEYSTONE SPECIES Has a disproportionately large effect on the ecosystem Dictates community structure

KEYSTONE SPECIES Has a disproportionately large effect on the ecosystem Dictates community structure Demonstrated by removal of keystone species from community EX. sea stars in tidepools

Sea star feeds on all bivalves Sea star feeds on all bivalves. When the sea star is removed from the tide pools one bivalve (mussel) out competes the rest for resources and becomes the dominant species.

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.